1. ESM Perspectives on IAV and Coordination with Other Groups Gerald A. Meehl National Center for Atmospheric Research

2. To facilitate connections across different disciplines in a variety of research communities, it is helpful to have community- representative panels or working groups, each with representatives from that community, to be able to interface with other similar panels or working groups from other research communities for the purpose of planning and coordinating earth system modeling activities Guiding principal: IPCC should assess research, not organize it (though in the past IPCC has stepped in if there was an organizational vacuum) It is helpful for an existing international organization to sponsor such panels or working groups to provide credibility to the effort, and to furnish travel funds for meetings

3. The IPCC WG1 research community working on Earth System Models World Climate Research Programme (WCRP) Working Group on Coupled Models (WGCM) global coupled climate modeling groups, model components, detection/attribution International Geosphere Biosphere Programme (IGBP) Analysis, Integration and Modeling of the Earth System (AIMES) carbon cycle modelers, dynamic vegetation, ecosystems, land cover, land use Joint WCRP-IGBP Atmospheric Chemistry and Climate (AC&C) atmospheric chemistry and aerosol modelers

4. The IPCC WG3 research community working on integrated assessment models and emission scenarios The Integrated Assessment Modeling Consortium (“The Consortium”) Integrated assessment modeling groups; Recently self-organized with no international sponsor as of yet

5. IPCC Working Group 2 research community working on impacts, adaptation and vulnerability IPCC Task Group on Data and Scenario Support for Impact and Climate Analysis (TGICA) representatives from WG1 and WG2; not designed as a community-representative group for IAV community; organized by IPCC What is needed: A community-representative group for the IAV community with members from major IAV groups internationally and key university IAV researchers, sponsored by an international organization (IHDP?) to interface with other panels and working groups